Bobbin can for automatic looms



Patented Feb. 28, 1933 UNITED STATES PATENT OFFICE WALTER H. WAKEFIELD, F WORCESTER, MASSACHUSETTS, ASSIGNCR TO CROMP I O N & KNOWLES LOOM WORKS, OF WORCESTER, MASSACHUSETTS, A. CORPORATION 01" V MASSACHUSETTS BOBBIN CAN FOR AUTOMATIC LCOMS v Applieation filed December 13, 1930. Serial No. 502,190.

This invention relates to improvements in devices for increasing the length of travel of an expelled bobbin in a weft replenishing loom and it is the general object of the invention to provide means which will cause the bobbin to traverse a greater path than is now required and to interpose in that path means for holding yarn of the weft end which extends from the expelled bobbin.

In weft replenishing mechanisms of the type wherein the bobbin is replaced it is customary to eject the exhausted bobbin by means of a transfer mechanism toward a socalled bobbin can standing on the floor of the weave shed and located under a chute which ordinarily forms part of the lay of the loom. At the time of transfer there is extending from the near selvage of the cloth a length of weft which lies. along the lay and extends between the shuttle and the binder and then through the shuttle eye to the reserve bunch of weft on the bobbin. In certain classes of weaving some difficulty is experienced in withdrawing'this length of weft completely from the shuttle box or out of the path of the moving shuttle. Unless the thread is taken out of the shuttle box there is danger that it will be whipped into the shed to form a thick place or a so-called drawn-in end.

The previously mentioned cans are of sufficient depth so that when they are substantially empty the bobbin has a long enough travel from the lay to withdraw the thread, but as the can is filled the distance through which the bobbin can travel is reduced with the result that the thread is not always pulled out of the shuttle box. It is an important object of my present invention to provide a bobbin can having a passage therein curved so as to require the bobbin to move through a substantial path before actually entering the main part of the can. In this way a greater opportunity is given for the bobbin to extract the trailing end from the box by its movement subsequent to transfer.

As shown herein the increased travel of.

so formed as to have an inside diameter of appreciable length along which the trailing end can be wrapped as the bobbin travels to the can proper.

itt is a further object of the invention t provide the receiving portion of the scroll with a surface to engage the butt of the'bobbin and retard the movement of the lat-torso as the bobbin moves through the scroll.

lVith these and other ob]ects in view which will appear as the description proceeds, my

invention resides in the combination and arrangement of parts hereinafter described and set forth in the claims. In the accompanying drawing whereinI have shown one form of the device for increasing the length of movement of the expelled bobbin, I

Fig. 1 is a front elevation of a well-known form of weft replenishing loom having associated therewith a can made according to my present invention. F ig.'2 is a side elevation taken inthe direction of arrow 2, Fig. 1, and" Fig. 3 is a horizontal section on line 33 of Fig. 1, showing the caninplan view.

Referring particularly to Figs. 1 and 2, I have shown a loomside 10 and a breast beam 11 together with a magazine designated gen-' orally at 12. A transfer mechanism 13 form'- ing part of the magazine is adapted in wellknown manner to engage a reserve bobbin 14 which may be in transfer position and insert it in the weft chamber of the shuttle 15, at the same time expelling the exhausted bobbin. The lay 16 may carry the usual hunter 17 to engage a latch 18 formingpart of the transfer mechanism, the latch being controlled by means of the rod 19 which'is acted upon by well-known mechanism to lift the latch into the path of the hunter when a transfer is about to take place. The lay is provided with a slot 20 through which the expelled bobbin 21 carried'by the shuttle 15 may pass in its downward movement incident to transfer.

The matter thus far described is well known in the art and of itself forms no'part of my present invention. 5

In carrying my. invention into effect I pro vide a bobbin can which may have a body formed with upright walls 31 which define a substantially rectangular chamber shown in Fig. 3 at 32. The can has associated therewith a hollow scroll 33 having an upwardly turned mouth 34 preferably of rather narrow rectangular form but of snfiicient width to receive the expelled bobbin. As shown in Fig. 1 the left hand side of the scroll immediately beneath the month has a downwardly inclined and curved surface 35 which cooperates with the substantially ver: tical right hand wall 36 to form a funnel terminating in a delivery tube 37. The latter is curved as shown in Fig. 1 to form a loop terminating in flared or funnel shaped end 38 which opens directly into the main bobbin can 30.

In operation the mouth Set will lie directly under the lay as suggested in F 2 and the downwardly moving bobbin will have its butt end retarded by engagement with the surface 35, so that the tip end will advance, said tip end sliding along the larger inter? nal surface 39 of the tube 33, and preferably length to. acc m date a relatively l g length of trailing end. In order t n ease the, length of thisi lterior curved surface lO the tube 37 may be made relatively small but of u i ent ize hat a bobbin can mo e e y herethwugh rom he oregoingit will be seen that I. have provided simple means for increasing he length of tr e o a Wei-t b b in a ter being expelled from. an ei hau ted shuttle an ha e nterpo ed in. the increa ed path throug which the bobb n passes structure which will ngage and gui e th railing nd- As hown herein he increased path is. accomplished by means of a scro l although I do not wish to be limited to this particul r nstruction na m ch any relatively fixed g ides loted; t nc eas thepath f he bobb n ill serve to a d he ithdraw ng o the Wef n s Ha ingthus d s r ed my invention it will be seen ha hanges and modifications may bemade h in y those ski l d in the. rt without departing from the spirit and scope o he in ntio nd I do n t ish to. be lim= ited to the deta ls herein d closed, but what 1- laim is I f ep en sl iagl om operatin with ashuttle, means to expel an exhausted bobbin from the shuttle, a receptacle for the bobbin, and means defining a looped guide through which the bobbin passes interposed betweentlie shuttle and receptacle.

In a weft replenishing loom operating Witha shuttle, means to expel an exhausted bobb n from the shuttle, a receptacle for the bobbin, and means presenting a looped sur face between the shuttle and the receptacle over which the bobbin must pass before reaching the receptacle.

3. In a weftreplenishing loom operating with a shuttle and having means to expel an exhausted bobbin from the shuttle, a' spent bobbin receptacle having a mouth and a guide pr v ed wi h a oped bb n guiding urace and a hread ei g gin element Within the bobbin guiding surface, said guiding surface requiring the bobbin to'move around the element to wrap the trailing weft thereof around ai lement,

4. In a. weft replenishing loom operating with a. shuttle andhavingmeans to expel an exhausted bobbin from the shuttle, a bobbin receptacle, and a tubular guide in the form of a scroll supported by the receptacle and having a bobbin receiving mouth under the shuttle, the scroll being so located that the expelled bobbin is required to pass therethrough before entering, the. receptacle.

5. A bobbin receptacle for a loom operat, ing with a shuttle from which an exhausted bobbin may be expelled, said receptacle hav-. ing a looped tubular guide provided with a mouth adjacent the-shuttle and shaped to guide a bobbin through a substantially loop: ed path ofmovement before. reaching the receptacle.

In testimony whereof I; have hereunto at: fixed my signature.

WALTER WAKEFIELD. 

